via this DPR thread:-http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=36897755In summary, the first test is about a boy running at 5km/hr towards the camera and the photo was taken when the boy was at 5 metres away and the distance of travel of the boy was measured for when the shot was finally made. So, the smaller the figure, the better that it would be. The lens used was with a
